#!/bin/bash

read -p "请输入第1个数字：" a
read -p "请输入第2个数字：" b

echo "a=$a, b=$b"
echo "a + b = `expr $a + $b`"
echo "a - b = `expr $a - $b`"
echo "a * b = `expr $a \* $b`"
echo "b / a = `expr $b / $a`"
echo "b % a = `expr $b % $a`"

